<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>求平均</title>
</head>
<body>
    <script>
        function gu(){
            var i,j,p;
            j=0;
            for(i=0;i<arguments.length;i++){
                j+=arguments[i];
            }
            p=j/arguments.length;
            return p;
        }
    var x=gu(1,2,3,4,6);
    alert(parseInt(x))
    
    </script>
</body>
</html>